228 S. D. Hayes on a New Lead-Salt. 
IL. 0°1958 grms. gave 16:23 ¢. c. at 0° C. and 760 mm. pres- 
sure =°0226 grms. i 
The water was determined by combustions with metallic 
copper. 
I. 0°7834 erms. gave 00274 grms. water. 
II. 09145 grms. gave 0°0314 grms. water. 
Ill. 0°4735 grms. gave 0°0177 grms. water. 
These results sum up as follows. 
I 
: IL. 11. Iv. 
Oxydoflead, - - - 4281 43 08 42°59 43°22 
Potash, - - - = 17:90 TTT 18°31 " 
Nitrogen, er 10:63 10°35 s 
Water, So - -.. $49 3°43 3-78 y 
Oxygen, by difference, - 25:16 * 25°02 
0-00 100°00 | 
_ The above analyses correspond to the following calculated 
formula: 
PbO, - - - - 11156 42°98 
WG 2 Ss Sogy egy 18:10 
Ne, = me - : - 28° 10°78 
O03, - - - - bd 64° 24°67 
pi 1 SSeS He Sat Or de cerca 9 347 
259°56 10000 
with the sulphate of lead. It loses its atom of water at 100° ©, 
but if the temperature be raised a few degrees higher, the 
fumes are given off abundantly. The crystals are of a bright 
yellow color, and remain unaltered in the air. ; 
Tam not yet prepared to give this salt any decided rational 
formula, but its composition may be expressed in several way 
as below. When 2NO, are passed over 2KO, we get KONO, 
and KONO,, two distinct salts, but if 2NO, be passed over 
CoO and KO, as in the ease of cobalt yellow, or over PbO and 
KO as in this salt, 
we get only one salt of a double compositio? 
which we must write— ; 
KONO, CoONO, or 
KONO, or PbONO,+HO <1 wie 
But there are objections to this: cobalt yellow is almost °F 
quite insoluble in water. ese 
salts may also be looked upo? 
as double per-oxyds, in which two e eeticnse of oxygen have 
been replaced by two equivalents of NO. but from the nature 
of the salts, I hardly think that NO, exists in them. How . 
